|Total photon absorption cross section measurements, theoretical analysis and evaluations for energies above 10 MeV (Volume NBS Technical Note 968) - Gimm, H. A.; Hubbell, J. H.|
Keywords: Photons; Photonuclear reactions; Absorption
|James spinning photons|
james spinning photons to DJ Paul Oakenfold live at the lizard lounge in Dallas, TX
Keywords: lights; photons; dj
Downloads: 793 (1 review)
|Multi-modal virtual environment research at Armstrong Laboratory - Eggleston, Robert G|
One mission of the Paul M. Fitts Human Engineering Division of Armstrong Laboratory is to improve the user interface for complex systems through user-centered exploratory development and research activities. In support of this goal, many current projects attempt to advance and exploit user-interface concepts made possible by virtual reality (VR) technologies. Virtual environments may be used as a general purpose interface medium, an alternative display/control method, a data visualization and an...
Keywords: PHOTONS; NORMAL DENSITY FUNCTIONS; NONLINEARITY; CAVITIES
|Photonz Live at ChuckECheeze|
This was a live edit from Darby of the Photonz playing one of their earlier shows at Chuck E. Cheese. I'm not sure about the year on this. This was a birthday party, and there is a spankin' good time!
Keywords: GTV; Darby; Photons; Live; Bluegrass; Rock; Party
Downloads: 594 (1 review)
|Crack propagation studies to determine benign or catastrophic failure modes for aerospace thin-rim gears - Lewicki, David G|
Analytical and experimental studies were performed to investigate the effect of rim thickness on gear tooth crack propagation. The goal was to determine whether cracks grew through gear teeth (benign failure mode) or through gear rims (catastrophic failure mode) for various rim thicknesses. Gear tooth crack propagation was simulated using a finite element based computer program. Principles of linear elastic fracture mechanics were used...
Keywords: PHOTONS; ELECTROMAGNETIC FIELDS; VACUUM; CAVITIES; NONLINEARITY
|Photons of Light - Episode 002 - Dr. Matt J. Carlson|
The particle nature of light is explained in this simple demonstration that light comes in little packets called photons.
Keywords: chemistry; physics; light; photons; science; education
|[nnnl.17] Antendex - Photons|
Thanks for visiting! Unfortunately the release is not available any more on NNNL. Please check the RELEASE PAGE for new infos!
Keywords: antendex; photons; nnnl.17, experimental; ambient; nnnl.hu
|Coordination of human upper arm and forearm motion in rapid extensions - Nahvi, Mahmoo|
In many movements of the upper limb such as reaching, positioning, and displacing the objects, the hand moves smoothly along a uni-directional planar trajectory with a bell-shaped speed profile. Because of variability of the load, gravitational and velocity interaction forces between its segments, the dynamics of the arm during the motion is very complex. Motion of the upper arm and the forearm are coordinated to produce smooth movements despite such complex dynamics...
Keywords: MATHEMATICAL MODELS; PHOTOMETERS; QUANTUM THEORY; PHOTONS; PROBABILITY THEORY
|Telerobotic remote presence: Achievements and challenges - Aviles, Walter A|
The topics discussed include the following: telepresence, telerobotics, teleoperators, man machine systems, robot control, and remote control.
Keywords: DOWN-CONVERTERS; IDENTIFYING; INTERFEROMETERS; PHOTONS; TIME DEPENDENCE; CAVITIES; IDLERS; SELECTION
|SCREENING OF ANTINUCLEAR FACTORS IN RHEUMATIC DISEASES - MENARD, H. A.|
EXPERIENCE WITH A SCREENING METHOD FOR ANTINUCLEAR ANTIBODIES WHICH USES INDIRECT IMMUNOFLUORESCENCE ON FORMALINIZED CHICKEN RED CELLS NUCLEI AS SUBSTRATE IS DISCUSSED. THE METHOD IS INEXPENSIVE, EASY TO STANDARDIZE, EASY TO PERFORM, AND PRESENTS A SENSITIVITY AND SPECIFICITY COMPARABLE TO CLASSICAL METHODS. SERA AND SYNOVIAL FLUIDS FROM PATIENTS WITH RHEUMATIC DISEASES WERE SCREENED. A DISCUSSION OF THE TECHNICAL ASPECTS AND THE CLINICAL APPLICATIONS IS INCLUDED.
Keywords: ANNIHILATION REACTIONS; OSO-7; COSMIC RAYS; GAMMA RAYS; PHOTONS; POSITRONS
|Effect of tips of wings moving at supersonic speed - Krasilshchilova, E. A|
No Abstract Available
Keywords: ATOMS; LIGHT EMISSION; NUCLEONS; PHOTONS; PROTONS; ELECTRONS; NUCLEAR PHYSICS
|Design and experimental evaluation of a turbopump lift-off seal Final report - Ritter, J. A|
Hydrostatic life-off seal zero leakage and static sealing and rubbing tests for use in liquid hydrogen turbine pumps
Keywords: COSMOLOGY; GAMMA RAYS; INTERGALACTIC MEDIA; LIGHT SOURCES; PHOTONS; X RAYS
|Preliminary Thermal-Mechanical Sizing of Metallic TPS: Process Development and Sensitivity Studies - Poteet, Carl C.|
The purpose of this research was to perform sensitivity studies and develop a process to perform thermal and structural analysis and sizing of the latest Metallic Thermal Protection System (TPS) developed at NASA LaRC (Langley Research Center). Metallic TPS is a key technology for reducing the cost of reusable launch vehicles (RLV), offering the combination of increased durability and competitive weights when compared to other systems...
Keywords: LASER APPLICATIONS; CONTINUOUS WAVE LASERS; PHOTONS; TARGETS; YAG LASERS; DAMAGE
|Possible interpretation of isotropic gamma-ray observations - NON|
Cosmic, isotropic gamma ray spectra, primordial gamma ray sources, and intergalatic gas density
Keywords: ANNIHILATION REACTIONS; ANTIPROTONS; GAMMA RAYS; PROTONS; COSMIC RAYS; PHOTONS
|Models of remote manipulation in space - Hannaford, Blak|
Robots involved in high value manipulation must be effectively coupled to a human operator either at the work-site or remotely connected via communication links. In order to make use of experimental performance evaluation data, models must be developed. Powerful models of remote manipulation by humans can be used to predict manipulation performance in future systems based on today's laboratory systems...
Keywords: AMPLIFICATION; COHERENT LIGHT; OSCILLATORS; PHOTONS; BEAM SPLITTERS; WIGNER COEFFICIENT
|Non-linear resonance of fluids in a crystal growth cavity - Wang, Francis C|
In the microgravity environment, the effect of gravity on fluid motion is much reduced. Hence, secondary effects such as vibrations, jitters, surface tension, capillary effects, and electromagnetic forces become the dominant mechanism of fluid convection. Numerous studies have been conducted to investigate fluid behavior in microgravity with the ultimate goal of developing processes with minimal influence from convection...
Keywords: HAMILTONIAN FUNCTIONS; RADIATION DISTRIBUTION; RAMAN SPECTRA; DEGENERATION; PHOTONS
|A facility to produce an energetic, ground state atomic oxygen beam for the simulation of the Low-Earth Orbit environment - Ketsdever, Andrew D.|
Because of the continuing commitment to activity in low-Earth orbit (LEO), a facility is under development to produce energetic atmospheric species, particularly atomic oxygen, with energies ranging from 5 to 80 eV. This relatively high flux facility incorporates an ion engine to produce the corresponding specie ion which is charge exchanged to produce a neutral atomic beam. Ion fluxes of around 10(exp 15) sec(exp -1) with energies of 20-70 eV have been achieved...
Keywords: PHOTONS; QUANTUM MECHANICS; BEAM SPLITTERS; INTERFERENCE; INTERFEROMETRY; PARADOXES
|Comparison of theoretical and experimental photoeffect data 0.1 keV to 1.5 MeV (Volume NBS Technical Note 901) - Hubbell, John Howard; Veigele, Wm. J.|
Keywords: Photoelectricity; X-rays; Gamma rays; Photons; Cross sections (Nuclear physics)
|Space vehicle thermal rejection system - NON|
A space vehicle thermal heat rejection system 10 utilizing separate optimized heat pipe components for the functions of heat acquisition, heat transport, and heat rejection. A honeycomb panel heat pipe evaporator section 20 performs the function of heat acquisition, and forms a closed thermodynamic system with a dual channel heat pipe transport section 30, which performs the function of heat transport...
Keywords: HIGH SPEED CAMERAS; IMAGING TECHNIQUES; NUCLEAR MEDICINE; PHOTONS; PATENTS
|Simulation of Shuttle launch G forces and acoustic loads using the NASA Ames Research Center 20G centrifuge - Shaw, T. L.|
The high cost and long times required to develop research packages for space flight can often be offset by using ground test techniques. This paper describes a space shuttle launch and reentry simulating using the NASA Ames Research Center's 20G centrifuge facility. The combined G-forces and acoustic environment during shuttle launch and landing were simulated to evaluate the effect on a payload of laboratory rates...
Keywords: INEQUALITIES; PARADOXES; PHOTONS; QUANTUM MECHANICS; EXPERIMENTATION; INTERFERENCE; MEASUREMENT
|Three-D CFD analysis of hydrostatic bearings - Lin, Shyi-Jang|
The hydrostatic bearing promises life and speed characteristics currently unachievable with rolling element bearings alone. In order to achieve the speed and life requirements of the next generation of rocket engines, turbopump manufacturers are proposing hydrostatic bearings to be used in place of, or in series with, rolling element bearings. The design of a hydrostatic bearing is dependent on accurate pressure in the bearing...
Keywords: COMPRESSING; COUNTING; DEFORMATION; LASERS; PHOTONS; SELECTION; COMMUTATION; HAMILTONIAN FUNCTIONS
|World of the Fifth Sun: Earth changes - Carlos Barrios|
THE WORLD WILL NOT END IN 2012 Carlos Barrios was born into a Spanish family on El Altiplano, the highlands of . His home was in Huehue tenango, also the dwelling place of the Maya Mam tribe. With other Maya and other indigenous tradition keepers, the Mam carry part of the old ways on Turtle Island ( North America ). They are keepers of time, authorities on remarkable calendars that are ancient, elegant and relevant...
Keywords: Barrios; mayan; 2012; 2013; prophecy; ascension; photons; prana; church
|Relativistic Quantum Theory part 1 - V.B. Berestetskii, E.M. Lifshitz & L.P. Pitaevskii|
V.B. Berestetskii, E.M. Lifshitz & L.P. Pitaevskii Relativistic Quantum Theory ( Volume 4 part 1 of A Course of Theoretical Physics ) Pergamon Press 1971 Acrobat 7 Pdf 19.0 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Photons; Bosons; Fermions; Scattering Matrix; Perturbation Theory; Interactions; Landau
|Theory of Photons & Electrons - J.M. Jauch & F. Rohrlich|
J.M. Jauch & F. Rohrlich Theory of Photons & Electrons Addison-Wesley 1955 Acrobat 7 Pdf 20.7 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Radiation; Photons; S-Matrix; Divergence; Renormalisation; Positronium; Quantum; Electrodynamics
|The two-photon laser - Ilinova, T. M|
Resonance curves for excitation of stationary oscillations, and two photon laser study
Keywords: EXCITATION; LASERS; OSCILLATIONS; PHOTONS; RESONANCE; LASER; OSCILLATION; PHOTON; RESONANCE
|The search for materials to mitigate spacecraft charging - Losure, Nancy S|
As spacecraft orbit the earth, they encounter a variety of particles and radiation. Charged particles are common enough that a spacecraft can collect substantial charges on its surfaces. If these charges are not bled off, they can accumulate until electrostatic discharges occur between a charged surface and some lower-potential location on the craft. Electrostatic discharge (ESD) is the suspected culprit in a number of spacecraft failures...
Keywords: PHOTONS; POLARIZATION (CHARGE SEPARATION); DIPOLES; ROTATION; ATOMS; TRAPPING
|KOLOREALASKVAGUE part2 - Realaskvague|
without sense , just hight colors & hot toast , see also the First , same video but abstract ambient sound without "drum" ... Bon Apetit and let's your eyes become square °.~))
Keywords: hight voltage; colours; photons; frequency; experimental; optical; music; noise; industrial; light; hypnotic
|Numerical Study of Wake Vortex Behavior in Turbulent Domains with Ambient Stratification - Switzer, George F.|
A three-dimensional large eddy simulation model is used to investigate the sensitivity of ambient stratification with turbulence on the behavior of aircraft wake vortices. Modeled ambient turbulence levels range from very weak to moderate, and stratification levels range from strongly stable to unstable. The results of profound significance from this study are: 1) very little sensitivity between vortex linking time and the level of stratification, 2) the mean vortex separation remained nearly co...
Keywords: PHOTONS; LIGHT SCATTERING; NEAR FIELDS; PHYSICAL OPTICS; OPTICAL PROPERTIES; SPECTROSCOPY; CONFERENCES
|Drive circuit for minimizing power consumption in inductive load Patent - Crawford, W. E|
Automatic power supply circuit design for driving inductive loads and minimizing power consumption including solenoid example
Keywords: GALACTIC RADIATION; GAMMA RAYS; MILKY WAY GALAXY; BREMSSTRAHLUNG; COMPTON EFFECT; PHOTONS; RADIATION SOURCES; SYNCHROTRON RADIATION
|Tests of a two-photon technique for measuring polarization mode dispersion with subfemtosecond precision (Volume 104) - Dauler, Eric|
Journal of Research of the National Institute of Standards and Technology
Keywords: quantum interference; coincidence; entangled photons; polarization interferometer; polarization mode dispersion (PMD)
|Mobility of Electron in DNA Crystals by Laser Radiation - Zhang, Kaixi|
The mobility of electrons in laser radiated DNA is closed to the energy transfer and energy migration of a biological molecule. Arrhenius has studied the conductivity of the electrons in a biological molecule. But his result is far from the experimental result and meanwhile the relation between some parameters in his theory and the micro-quantities in DNA is not very clear. In this paper, we propose a new phonon model of electron mobility in DNA and use Lippman-Schwinger equation and S-matrix th...
Keywords: DOWN-CONVERTERS; QUANTUM MECHANICS; QUANTUM OPTICS; PHOTONS; PHASE MATCHING; FORMALISM; CRYSTAL OPTICS; PHYSICAL OPTICS
|Dorset Experiment 5 - The Study of Light Photons - Patrick Bruskiewich|
The purpose of this lab is to study some properties of light photons, to learn how logarithms can be used to find a power law relationship, and to use this technique to derive the Wien Displacement Law and Stefan-Boltzmann Law. The Temperature of the Surface of the Sun will be estimated using the Wien Displacement Law. Using the Wien Displacement Law it is possible to provide a simple derivation of the Planck Expression.
Keywords: Light Photons; Wien Displacement Law; Stefan Boltzmann Law; Planck's Constant; spectrum of the sun
|Net Thermal Radiation in the Atmosphere of Venus - Revercomb, H. E.|
The four entry probes of the Pioneer Venus mission measured the radiative net flux in the atmosphere of Venus at latitudes of 60 deg. N, 31 deg. S, 27 deg. S, and 4 deg. N. The three higher latitude probes carried instruments (small probe net flux radiometers; SNFR) with external sensors. The measured SNFR net fluxes are too large below the clouds, but an error source and correction scheme have been found (H...
Keywords: SOLAR FLARES; IMAGING TECHNIQUES; ASTROPHYSICS; PHOTONS; GAMMA RAYS; COLLIMATORS; ALBEDO; SPECTROSCOPY; SPATIAL RESOLUTION; POINT SOURCES
|A Model for the Limiting Piston Stroke in Vortex Ring Formation - Shariff, K|
Many devices eject a mass of fluid either in one shot or periodically. Examples include heart valves and flapping wings. Often the goal is to maximize the volume of fluid moving as a coherent vortex ring away from the exit. M. Gharib (California Institute of Technology) used a piston to experimentally study fluid ejected from a pipe and found that the largest coherent mass of fluid was attained at a piston stroke (normalized by diameter) of 4 under a variety of circumstances, including different...
Keywords: FLOW CHARACTERISTICS; SPECTROSCOPY; LASER INDUCED FLUORESCENCE; ENTHALPY; LINE SPECTRA; SPECTRAL CORRELATION; PHOTONS
|Production of positrons bombardment of thick foils fast electrons - Bautin, A. V.|
Angular distribution and outflow of photons and positrons during foil bombardment by fast electrons
Keywords: ANGULAR DISTRIBUTION; POSITRON; ELECTRON BOMBARDMENT; ELECTRONS; FOILS; PHOTONS; POSITRONS; ANGULAR DISTRIBUTION; ELECTRON BOMBARDMENT; FOIL
|Geochemistry of Pallasite Olivines and the Origin of Main-Group Pallasites - Mittlefehldt, D. W.|
Main-group pallasites (PMG) are mixtures of iron-nickel metal and magnesian olivine thought to have been formed at the core-mantle boundary of an asteroid . Some have anomalous metal compositions (PMG-am) and a few have atypically ferroan olivines (PMG-as) . PMG metal is consistent with an origin as a late fractionate of the IIIAB iron core . Most PMG olivines have very similar Fe/Mg ratios, likely due to subsolidus redox reaction with the metal ...
Keywords: SOLAR ELECTRIC PROPULSION; FABRICATION; SOLAR SAILS; TETHERLINES; AEROCAPTURE; CHEMICAL PROPULSION; PHOTONS; PROPULSION
|KOLOREALASKVAGUE1 First - Realaskvague|
without sense , just hight colors & cold ambient toast , Bon Apetit and let's your eyes become square °.~))
Keywords: hight voltage; colours; photons; frequency; experimental; optical; music; noise; industrial; light; hypnotic; ambient; medication; music; video
|The radius of hole teleportation and quantum teleportation is limited by Hubble sphere - Constantin Leshan|
The maximal distance of hole teleportation and quantum teleportation is limited by cosmological expansion and cannot exceed the Hubble's radius (c/H0) ~ 13 billions of light years. Entanglement depends on the distance, there is ultimate, fundamental and insuperable distance for teleportation as Hubble sphere. Besides quantum teleportation is limited by anthropic barrier 1 - 100 parsec. - The radius of quantum and hole teleportation depends on speed of movement, the more speed, the more the radiu...
Keywords: Green zone; Hubble sphere; acceleration; uniform rectilinear motion; cosmological expansion; superluminal photons; human teleportation
|Protein crystallization studies - Lyne, James Evan|
The Structural Biology laboratory at NASA Marshall Spaceflight Center uses x-ray crystallographic techniques to conduct research into the three-dimensional structure of a wide variety of proteins. A major effort in the laboratory involves an ongoing study of human serum albumin (the principal protein in human plasma) and its interaction with various endogenous substances and pharmaceutical agents. Another focus is on antigenic and functional proteins from several pathogenic organisms including t...
Keywords: QUANTUM THEORY; PROBABILITY THEORY; PHOTONS; PARTICLE THEORY; BEAM SPLITTERS; WAVE FUNCTIONS; HOMODYNE RECEPTION
|Mach 4 Performance of a Fixed-Geometry Hypersonic Inlet with Rectangular-to-Elliptical Shape Transition - Smart, Michael K.|
Wind-tunnel testing of a hypersonic inlet with rectangular-to-elliptical shape transition has been conducted at Mach 4.0. These tests were performed to investigate the starting and back-pressure limits of this fixed-geometry inlet at conditions well below the Mach 5.7 design point. Results showed that the inlet required side spillage holes in order to self-start at Mach 4.0. Once started, the inlet generated a compression ratio of 12.6, captured almost 80% of available air and withstood a back-p...
Keywords: X RAY SPECTROSCOPY; GALACTIC CLUSTERS; LYMAN ALPHA RADIATION; CAMERAS; X RAY SPECTRA; RADII; PHOTONS
|Theoretical and experimental Compton scattering cross sections at 1.12 MeV in the case of strongly bound K-shell electrons (Volume 78A) - Prasad, P.N.B.|
Journal of Research of the National Bureau of Standards
Keywords: Compton scattering; differential cross section; electron binding; gamma rays; K-shell; photons
|Enabling the Discovery of Recurring Anomalies in Aerospace System Problem Reports using High-Dimensional Clustering Techniques - Srivastava, Ashok, N.|
This paper describes the results of a significant research and development effort conducted at NASA Ames Research Center to develop new text mining techniques to discover anomalies in free-text reports regarding system health and safety of two aerospace systems. We discuss two problems of significant importance in the aviation industry. The first problem is that of automatic anomaly discovery about an aerospace system through the analysis of tens of thousands of free-text problem reports that ar...
Keywords: GAMMA RAY BURSTS; TIME DEPENDENCE; FREQUENCIES; SIGNATURES; PHOTONS; PROTONS; ELECTRONS; TRENDS; KINETIC ENERGY
|Coset Codes Viewed as Terminated Convolutional Codes - Fossorier, Marc P. C.|
In this paper, coset codes are considered as terminated convolutional codes. Based on this approach, three new general results are presented. First, it is shown that the iterative squaring construction can equivalently be defined from a convolutional code whose trellis terminates. This convolutional code determines a simple encoder for the coset code considered, and the state and branch labelings of the associated trellis diagram become straightforward...
Keywords: GAMMA RAY BURSTS; COSMOLOGY; GAMMA RAY OBSERVATORY; PHOTONS; ASTRONOMICAL MODELS; HOMOGENEITY; INHOMOGENEITY
|Non-destructive evaluation of composites - Chu, Tsuchin Phili|
The composite materials have been used in aerospace industries for quite some time. Several non-destructive evaluation (NDE) methods have been developed to inspect composites in order to detect flaws, matrix cracking, and delamination. These methods include ultrasonics, acoustic emission, shearography, thermography, X-ray, and digital image correlation. The NDE Branch of Marshall Space Flight Center has recently acquired a thermal imaging NDE system...
Keywords: CRYPTOGRAPHY; OPTICAL FIBERS; QUANTUM MECHANICS; QUANTUM THEORY; SECURITY; SCRAMBLING (COMMUNICATION); COMMUNICATION; MESSAGE PROCESSING; INFORMATION THEORY; PHOTONS
|Supersonic combustion of hydrogen in a vitiated air stream using stepped wall injection - Burrows, M. C.|
Combustion physics and ignition of hydrogen in supersonic stream of vitiated air or inert gases using stepped-wall injection procedure
Keywords: ELECTROMAGNETIC ABSORPTION; GAMMA RAYS; INTERGALACTIC MEDIA; INTERSTELLAR GAS; COSMOLOGY; ELECTRONS; PAIR PRODUCTION; PHOTONS; RED SHIFT
|EFFECT OF TITANIUM, BORON AND MOLYBDENUM ON THE STRUCTURE OF AUSTENITIC 18/10 STEEL AFTER SOLUTION HEAT TREATMENT AND SENSITIZATION - BOJARSKI, Z.|
AUSTENITIC STEELS TYPES OH18N9, IH18N10T, IH1810TB AND IH18N10MT MANUFACTURED IN POLAND AND IMPORTED X10CRNITI X10CRNITI18.9 STEEL WERE INVESTIGATED AFTER SOLUTION HEAT TREATMENT AND ANNEALING AT 500, 650 AND 750 C. THE METHODS USED WERE OPTICAL AND ELECTRON MICROSCOPY, X-RAY PHASE ANALYSIS AND X-RAY MICROANALYSIS. THE FOLLOWING INCLUSIONS WERE OBSERVED IN SOLUTION HEAT TREATED STEELS: IN OH18N9 STEEL NONMETALLIC OXIDE AND SULFIDE INCLUSIONS AND IN THE REMAINING TYPES OF STEELS ALSO CARBIDE, TIT...
Keywords: GAMMA RAYS; SOLAR FLARES; ELECTROMAGNETIC RADIATION; NUCLEI (NUCLEAR PHYSICS); PHOTONS; RADIO ASTRONOMY; X RAYS
|Gamma-ray absorption processes at high red shifts - NON|
Gamma ray absorption processes at high red shifts, and energy dependences of absorption processes in interstellar and intergalactic gas
Keywords: FREE ELECTRONS; GAMMA RAYS; POSITRON ANNIHILATION; ENERGY SPECTRA; PHOTONS; POSITRONIUM; QUANTUM ELECTRODYNAMICS
|The Meteosat system - Felix, H|
Meteosat weather satellite and ground support system
Keywords: COSMIC RAYS; ENERGY SPECTRA; GAMMA RAYS; PIONS; DECAY; GALACTIC RADIATION; PARTICLE PRODUCTION; PHOTONS; PROTONS
|Studies on the use of supercritical ammonia for ceramic nitride synthesis and fabrication - Cornell, Linda|
The extractability of ammonia halides (including ammonium thiocyanate) formed as byproducts from the synthesis of Si(NH)2 via ammonolysis of the corresponding silicon tetrahalides using supercritical NH3 as the extraction medium was investigated. It was found that the NH4SCN byproduct of ammonolysis of Si(SCN)4 can be almost completely extracted from the insoluble Si(NH)2 forming a promising system for the synthesis of pure Si(NH)2, one of the best precursors for Si3N4...
Keywords: ADIABATIC DEMAGNETIZATION COOLING; SELECTION; SENSITIVITY; TELESCOPES; BOLOMETERS; REFRIGERATING; ASTRONOMY; CONTINUOUS SPECTRA; DURABILITY; ESTIMATING; PHOTONS; PROGRESS
|INTRACYTOPLASMIC ULTRASTRUCTURES IN PERIPHERAL BLOOD CELLS IN LUPUS ERYTHEMATOSUS - METZ, G.|
BUFFY COATS OF PERIPHERAL BLOOD OF DIFFERENT MANIFESTATIONS OF LUPUS ERYTHEMATOSUS WERE STUDIED BY ELECTRON MICROSCOPY FOR THE EXISTENCE OF VIRUSLIKE INTRACYTOPLASMIC TUBULAR STRUCTURES. THEY COULD ALWAYS BE DEMONSTRATED IN THE BLOOD LEUKOCYTES OF SYSTEMIC LUPUS ERYTHEMATOSUS INDEPENDENT OF DURATION, SEVERITY AND PRIOR MEDICAL TREATMENT OF THE DISEASE, BUT WERE COMPLETELY ABSENT IN CHRONIC DISCOID LUPUS ERYTHEMATOSUS...
Keywords: CARBON DIOXIDE; HEAT; MARS (PLANET); PHOTODISSOCIATION; PLANETARY ATMOSPHERES; VENUS (PLANET); ENERGY CONVERSION; PHOTONS; THERMOSPHERE